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Ann Thorac Surg 2001;71:1210-1214
© 2001 The Society of Thoracic Surgeons
a Department of Surgery II, Division of Cardiovascular Surgery, Nippon Medical School, Tokyo, Japan
b Department of Internal Medicine I, Nippon Medical School, Tokyo, Japan
Accepted for publication November 28, 2000.
Address reprint requests to Dr Ochi, 1-1-5 Sendagi Bunkyo-ku, Tokyo, 113-8603, Japan
e-mail: ochi/surg2{at}nms.ac.jp
Background. The flow capacity of the right gastroepiploic artery graft has not been clarified.
Methods. Angiographic and echocardiographic studies were conducted in 30 patients who had undergone coronary artery bypass grafting using both the internal thoracic and right gastroepiploic arteries. The luminal diameter of the arterial grafts was measured from the postoperative angiograms. The adequacy of the myocardial blood supply from the arterial grafts was evaluated by dobutamine stress echocardiography.
Results. With echocardiography, 14 patients exhibited an ischemic response in the gastroepiploic artery grafted region, whereas no patients exhibited an ischemic response in the internal thoracic artery grafted area. The luminal diameter of the gastroepiploic artery and a younger age were correlated with the ischemic response observed in the dobutamine stress echocardiography. A luminal diameter of the gastroepiploic artery of greater than 2.6 mm had the highest sensitivity and specificity for a nonischemic change.
Conclusions. To generate the maximal flow reserve, the luminal diameter of the gastroepiploic artery when used as a graft should be sufficiently large enough, nearly 3 mm at the anastomosis.
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